Messages

1

General Mach Discussion / Re: X axis will not change direction during cut

« on: March 01, 2009, 05:08:48 PM »

Yes all wiring is 22 gauge and shielded.
Are you talking about the 3x 4" IDC Cable 10-pin from the BOB to the individual drivers as possably being bad and causing the noise?
Forgive me but what do you mean by Active State?
I did find this in the driver paperwork "The SideStep is negative logic. The STEP, DIRECTION and ENABLES lines should be inverted in your software", I don't really know what that means but I thought I would mention it.

2

General Mach Discussion / Re: X axis will not change direction during cut

« on: March 01, 2009, 10:06:01 AM »

Ok I set those to 5 but still the same results......
I did notice on my driver test that I have some high spikes, possible noise, I'm not sure how to properly get rid of this unwanted noise...? could that be what is causing this behavior?

3

General Mach Discussion / Re: X axis will not change direction during cut

« on: March 01, 2009, 07:47:26 AM »

I ran the G1X10Y10F10 four times and here are the results, 1st run- both X&Y respond like they should starting from home positionthey both reach the end of their respected runs and both reverse like normal  2nd run- Both X&Y leave home position and after about two to two and a half inches X reverses and the DRO of course is showing it moving the right direction  3rd run- Y axis leaves home postion along with X except this time X is moving negative 4th run- both X&Y leave home position reach the end of the run Yaxis reverses and X axis continues in a positive direction, I am baffled, I also ran just the X axis thru the same procedure without the Y axis and came up with the same results the x axis responded in the same sporadic behavior, I am in the process of adding Home and Limit switches to my mill I don't know if that will help, I also have attached my .XML.
I think I will check for noise and run the setup tests again to see if anything has changed, I'm grasping at anything at this point.
Hood thanks for your patients and effort on this matter it is greatly appreciated.

4

General Mach Discussion / Re: X axis will not change direction during cut

« on: February 28, 2009, 04:42:54 PM »

Yes I can jog the x axis in both directions and can even type in a G' code in the MDI, like G1X2F10 and all is well, but when running a program the X axis messes up?
I don't think this would make a difference but here is the motor tuning settings, I am not after speed at this point:

X & Y axis,
Steps 32000
Vel.    8
Acc.   1
Step Pulse  1
Dir Pulse     2

Z axis,
Steps  32000
Vel.     10
Acc.     1
Step Pulse  1
Dir Pulse     2

5

General Mach Discussion / X axis will not change direction during cut

« on: February 28, 2009, 08:14:42 AM »

Hello all, I am new to the world of CNC so bare with me please, I have recently built a 3 axis machine using Probotix components, everything seems to work fairly well, and by that I mean I can jog motors and they don't make any horrible noises (anymore) my settings could probably use some adjusting, but the problem I am having is when running the test Roadrunner in Mach 3, all seems to work well until the x axis reaches the end of the first what I will call positive (+) cut instead of reversing and cutting back negative (-) direction it continues on to a positive cut even though Mach 3 shows it correct on the screen, the Y and Z axis are working correctly, any advise would be greatly appreciated.

The Probotix is as follows:

3x SideStep Bi-Polar Stepper Motor Driver
3x HT23-400-4 400ozin Stepper Motor
PBX-2 Parallel Port Breakout Board
24Volt 4.3Amp Switching Power Supply
6ft. DB25 Male-to-Male Cable
3x 4" IDC Cable 10-pin